关键词: 物种多样性, 自然恢复, 针叶林, 亚高山

Abstract: Species diversity development and collocation play an important role in the process of restoration and reestablishment of subalpine coniferous forest.The survey on 7 communities of gramineous community (dominated by Deyeuxia scabrescens),willow shrub (dominated by Salix paraqplesia),birch forest (dominated by Betula platyphylla),needle and broad-leaf mixed forest (dominated by Betula spp. and Picea purpurea),fir forest (dominated by Abies faxoniana),spruce forest (dominated by P. purpurea)and spruce plantation (dominated by P. asperata),was conducted in order to study the species diversity,community coefficient and community similarity coefficient of different natural restoration stages in subalpine coniferous zone.The results indicated that:①The species abundance (S)were 46,54,69,38,61,38 and 26,the Shannon-Wienner diversity index (H)were 2.42 (±0.10),2.71 (±0.06),2.93 (±0.06),2.59 (±0.11),1.83 (±0.43),1.81 (±0.32)and 1.75 (±0.24),the integrated diversity index (Z)was 17.39 (±1.81),22.52 (±1.09),23.76 (±2.09),18.13 (±1.74),7.05 (±1.75),6.69 (±1.01)and 5.26 (±2.30)in gramineous community,willow shrub,birch forest,needle and broad-leaf mixed forest,fir forest,spruce forest and spruce plantation,respectively.②In the restoration process,the species abundance,diversity and evenness of 7 types communities fluctuated with the natural restoration,and the development trend was "low-high-low".Following the process of natural restoration,lots of the herb were replaced by shrubs,and then the shrubs were replaced by trees.The structure of climax community was were perfect compared to the earlier restoration communities although its species were lower.③The neighbor communities in the process of restoration had the higher similarity,and the communities of similar canopy structure had more common species.

Key words: species diversity, natural restoration, coniferous forest, subalpine